Iowa State University Veterinarian Records, RS 22/6/0/9, University Archives, Special Collections Department, Iowa State University, http://www.add.lib.iastate.edu/spcl/arch/rgrp/22-6-0-9.html
On Oct. 24, 1952, a 2-year-old Hereford bull was admitted to the Stange Memorial Clinic with a history of difficult breathing for two weeks and of not eating for the past two days. Examination of the animal revealed a mucous exudate from the nostrils, and when the larynx was compressed laterally the air passage was almost completely blocked. Pressure on the larynx induced coughing. The breath had a putrid odor. Ausculation over the lungs was not revealing because of the stertorous sounds produced by the stenotic condition of the larynx.
"Chronic Bilateral Paralaryngeal Abscesses in a Hereford Bull,"
Iowa State University Veterinarian: Vol. 15
, Article 11.
Available at: http://lib.dr.iastate.edu/iowastate_veterinarian/vol15/iss2/11